The definition of a Millennial - https://en.wikipedia.org/wiki/Millennials
Are you born after 1984 and have a millennial mindset?
Do you employ millennials and have challenges in dealing with them in the work place?
If so, see this great short and to the point summary video on a theory of who Millennials are, how they came to be and the challenges for both the Millennials and their employers - https://www.youtube.com/watch?v=hER0Qp6QJNU
As with anything in life, there are pro's and cons with being part of a specific generation, just like currently being part of the "Old generation" in today's world.